Does stash use TempDB ?

Have been asked to install Stash using our MS-SQL cluster, however all the instances are CI collation whereas Stash requires a CS collation.

Given this collation requirement, and that I can't add another CS collation instance to the cluster, does Stash actually use TempDB at all ? If not, could I install the Stash DB on this cluster, even though the database collation does not match the server collation ?